Fix Google Forms Migration Fails with Unsupported File Type
Question details
Users need to resolve an issue where Google Forms fail to migrate to Microsoft 365 due to an unsupported MIME type error, despite official documentation indicating they are supported.
- Product
- Microsoft 365
- Device & OS
- not provided
- Scenario
- Migrating organizational data from Google Workspace to Microsoft 365 using the built-in migration tools.
- Observed behavior
- Google Forms fail to migrate during the process, resulting in the MEXPORTFILEUNSUPPORTEDMIMETYPE error code.
Gather your migration batch details, including the affected file identifiers, exact result codes, timestamps, and migration logs, as these will be required for support investigation.
Open a Service Request in the Microsoft 365 Admin Center
Since this involves a backend processing error with supported file types, you must contact Microsoft Support to investigate the migration logs directly.
The MEXPORTFILEUNSUPPORTEDMIMETYPE error occurring on multiple officially supported files typically indicates a backend processing glitch in the Microsoft 365 migration engine. Direct intervention by Microsoft support engineers is required to clear the bottleneck or fix the MIME type recognition.
Navigate to admin.microsoft.com and log in using your global administrator or migration administrator credentials.
Click on the 'Support' icon located in the bottom right corner or select 'Help & support' from the left-hand navigation menu.
Type 'Google Forms migration MEXPORTFILEUNSUPPORTEDMIMETYPE' in the search bar. If the automated solutions do not resolve the issue, click 'Contact support' to open a new ticket.
In the ticket description, include your migration batch details, the specific affected file identifiers, result codes, timestamps, and attach the relevant migration logs for the engineers to investigate.
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Frequently Asked Questions
What does the MEXPORTFILEUNSUPPORTEDMIMETYPE error mean?
This error code indicates that the migration engine encountered a file type (MIME type) that it currently cannot process or convert. During a Google Workspace migration, it sometimes incorrectly triggers on supported files due to backend service glitches.
Are Google Forms officially supported in Microsoft 365 migrations?
Yes, standard Google Workspace files, including Google Forms, are typically supported in the migration process. When they fail with this specific unsupported file type error, it usually requires a backend fix by Microsoft Support.
How can I manually export Google Forms data if the migration fails?
While you cannot directly migrate the interactive form structure itself to Microsoft Forms manually, you can open the Google Form, navigate to the Responses tab, and export the form data as a CSV or Google Sheets file. You can then download this as an Excel file to retain your collected data.
